Framejumps if FPS are changed in MKV Container

[daedalus 434]

Quote

Frame rate mode             : Constant
Frame rate                  : 25.000 FPS
Original frame rate         : 23.976 (24000/1001) FPS

Files that have set a new framerate in the mkv container result in framejumps every other second

happens on stable .83 and beta .87

does not happen when using the internal player, vlc or on team yellow

[ebr 16178]

4 hours ago, daedalus said:

Files that have set a new framerate in the mkv container

What exactly does that mean?  You re-encoded the entire video to a different frame rate?  How was it interpolated from 23.976 to 25?

[daedalus 434]

no reencode, no interpolation

just a change in the container to play video at a different framerate

[rbjtech 5284]

21 hours ago, daedalus said:

no reencode, no interpolation

just a change in the container to play video at a different framerate

I'm scratching my head on why you would do that ? 

[pwhodges 2012]

53 minutes ago, rbjtech said:

I'm scratching my head on why you would do that ? 

To get the true PAL DVD experience...

Paul

[rbjtech 5284]

26 minutes ago, pwhodges said:

To get the true PAL DVD experience...

Paul

PAL / 25fps are not the same thing .. 

I'm sure the OP has a valid reason - I just can't think of why you would want to do that - playback at the fps it was recoded in - or you'll have pullup/pulldown/interpolation issues all over the place and it'll look like junk ..  

[pwhodges 2012]

1 hour ago, rbjtech said:

PAL / 25fps are not the same thing .. 

I'm sure the OP has a valid reason - I just can't think of why you would want to do that - playback at the fps it was recoded in - or you'll have pullup/pulldown/interpolation issues all over the place and it'll look like junk ..  

You think I don't know?

Paul

[daedalus 434]

none of the mentioned is the reason why it was done

i'm so sick to explain everything everytime here like to an 5yo, i always have the feeling no one ever really read any video/audio processing or format documentation and just copypasted their way down, then for sure the trolls came out and make fun of things and give "good" advice to avoid things they don't understand, instead of providing a solution or simply not saying anything

and even if it doesn't contribute to anything and has zero value in the problem solving process, here comes the final solving of the mystery, its simply done to get a foreign, 25p, synchronisation on a 23p video, this can be also be done by modifying the bitstream timings, but eg on hevc files this can be a compelx process, on h264 it can be done in mkvtoolnix but you have to explicitly select it and if not done, you have to remux everything affected

Edited March 29, 2023 by daedalus

[ebr 16178]

1 hour ago, daedalus said:

its simply done to get a foreign, 25p, synchronisation on a 23p video

But how do you do that without some sort of interpolation?

[pwhodges 2012]

Play it faster, like old European DVDs...

Paul

[daedalus 434]

56 minutes ago, ebr said:

But how do you do that without some sort of interpolation?

no interpolation needed, video just gets played with the newly set framerate

[rbjtech 5284]

14 hours ago, daedalus said:

none of the mentioned is the reason why it was done

i'm so sick to explain everything everytime here like to an 5yo, i always have the feeling no one ever really read any video/audio processing or format documentation and just copypasted their way down, then for sure the trolls came out and make fun of things and give "good" advice to avoid things they don't understand, instead of providing a solution or simply not saying anything

and even if it doesn't contribute to anything and has zero value in the problem solving process, here comes the final solving of the mystery, its simply done to get a foreign, 25p, synchronisation on a 23p video, this can be also be done by modifying the bitstream timings, but eg on hevc files this can be a compelx process, on h264 it can be done in mkvtoolnix but you have to explicitly select it and if not done, you have to remux everything affected

wow - and you expect help with a response like that ?

As fellow AV enthusiasts, asking questions is how we ALL gain experience and knowledge.

A Forum is not a dedicated 1:1 solution for your exact problem.

Unsubscribed. 

[daedalus 434]

3 hours ago, rbjtech said:

A Forum is not a dedicated 1:1 solution for your exact problem.

i know the problem and have a workaround for this, this bug report was to clear this bug for others

 

3 hours ago, rbjtech said:

Unsubscribed. 

it's gonna be a good day then